Reciprocating electromagnetic pump

ABSTRACT

A piston in a pump reciprocates by using forces of repulsion and attraction for an electromagnetic element toward a magnetic element. So fluid is pumped and guided with the help of several valves at different places in the pump.

FIELD OF THE INVENTION

The present invention relates to a pump; more particularly, relates to driving a piston having a magnetic element and a hollow flow path to reciprocate for pumping a fluid by using an electromagnetic element on a shell.

DESCRIPTION OF THE RELATED ARTS

General pumps include rotating pumps and reciprocating pumps, which are driven by motors to move blades or pistons to pump fluids. The fluids of the pumps may leak owing to defects or abrasions of the pumps; or, the pumps may even further fail in obtaining required fluid pressures.

A prior art, “a liquid-cooling heat sink pump”, is proclaimed in Taiwan, as shown in FIG. 6, comprising a pump shell 3 with a cooling liquid entrance 31 and a cooling liquid exit 32; a partition 4; an assembly of a rotor and blades 5; and a stator 6. Therein, the partition 4 divides the pump shell 3 into two isolated spaces, where one is a space containing the cooling liquid entrance 31 and the cooling liquid exit 32, and the other is a space having no entrance or exit for the cooling liquid. The assembly of the rotor and blades 5 is deposed in the space containing the cooling liquid entrance 31 and the cooling liquid exit 32. The stator 6 is deposed in the space having no entrance or exit for the cooling liquid; and is connected with a power supplier through a wire, which is totally isolated from the tube system of the prior art. The stator 6 drives the rotor and blades 5 at the outside of the tube system; and the blades 5 drives the cooling liquid flowing in the tube system.

Another prior art, “Pumping assembly using treadle”, is proclaimed in Taiwan as shown in FIG. 7, where a pump is deposed at bottom of a treadle (not shown in the figure). Therein, the main body 71 of the pump 7 is fixed with a cover 8 to form an inner room; a spring 91, a plate 92 and a button 93 are sequentially deposed in the inner room; the button 93 is penetrates out a top ceiling of the cover 8 corresponding to a hole on the treadle with the top surfaces of the button 93 and the treadle at almost the same height; and, inlet/outlet tubes 73 and their check valves 74 are deposed at two side ends of the main body of the pump 7.

Although the above prior arts pump fluids, their efficiencies may not remain the same after a period of use resulting in damage or aging. Or, the lockings of the parts may be loosened resulting in leaking the fluid. Hence, the prior arts do not fulfill users' requests on actual use.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to pump fluid with an improved leakage prevention.

To achieve the above purpose, the present invention is an electromagnetic reciprocating pump, comprising a shell having a fluid entrance and a fluid exit; a piston deposed in the shell; and an electromagnetic element at the outside, where an entrance check valve is deposed at the fluid entrance; an exit check valve is deposed at the fluid exit; the piston divides the shell into a first room and a second room; the piston has a hollow flow path along an axis of the piston, and a piston check valve at an end of the flow path; magnetic elements are deposed at two ends of the piston; the shell has electromagnetic elements deposed at two ends, or has an electromagnetic element covered on the side surface; the electromagnetic element is connected with an electric power supplier to obtain pole of the electromagnetic element to produce forces of attraction and repulsion toward the magnetic element of the piston for the piston to reciprocate; fluid is controlled by the entrance check valve, the exit check valve and the piston check valve to flow in one-way direction. Accordingly, a novel electromagnetic reciprocating pump is obtained.

BRIEF DESCRIPTION OF THE DRAWINGS

The present invention will be better understood from the following detailed descriptions of the preferred embodiments according to the present invention, taken in conjunction with the accompanying drawings, in which

FIG. 1 is a perspective view showing a first preferred embodiment according to the present invention;

FIG. 2 is a cross-sectional view of the pump;

FIG. 3A is a cross-sectional view showing the movement of the piston toward the fluid entrance;

FIG. 3B is a cross-sectional view showing the movement of the piston toward the fluid exit;

FIG. 4 is a perspective view showing a second preferred embodiment;

FIG. 5 is a cross-sectional view of the pump; and

FIG. 6 is a cross-sectional view of a prior art.

FIG. 7 is a cross-sectional view of another prior art.

DESCRIPTION OF THE PREFERRED EMBODIMENT

The following descriptions of the preferred embodiments are provided to understand the features and the structures of the present invention.

Please refer to FIG. 1 and FIG. 2, which are a perspective view and a cross-sectional view showing a first preferred embodiment according to the present invention. As shown in the figures, the present invention is an electromagnetic reciprocating pump 1, comprising a shell 11 having a fluid entrance 111 and a fluid exit 112; a piston 12 having a hollow flow path 121; and a pair of electromagnetic elements 13.

The shell 11 has the fluid entrance 111 and the fluid exit 112 at two ends; the fluid entrance 111 and the fluid exit 112 are connected with tubes 2 respectively; an entrance check valve 1111 and an exit check valve 1121 are respectively deposed at places where the tubes 2 are connected with the fluid entrance 111 and the fluid exit 112; the entrance check valve 1111 controls an entrance of fluid into the pump 1; and, the exit check valve 1111 controls an exit of the fluid from the pump 1.

The piston 12 is deposed in the shell 11 with a space for reciprocating the piston 12; the piston 12 divides the shell 11 into a first room 113 and a second room 114; the piston 12 has a one-way flow path 121 along an axis of the piston 12; the piston check valve 122 controls and guides fluid to pass through the flow path 121; and, the piston 12 has a magnetic element 123 at each end.

The electromagnetic elements 13 are deposed at two ends of the shell 1 respectively and are connected with an electric power supplier. When a current is supplied, poles of the magnetic elements 123 at two ends of the piston 12 and poles of the electromagnetic elements 13 at two ends of the shell produce forces of repulsion or attraction to reciprocate the piston 12.

The pump 1 is driven by magnetism. By connecting the electromagnetic elements 13 at two ends the shell 11 to an outside power supplier, a current passes through the electromagnetic elements 13 to obtain poles of the electromagnetic elements 13 so that the piston 12 is driven to reciprocate by forces of repulsion and attraction.

Please refer to FIG. 3A and FIG. 3B, which are cross-sectional views showing movements of the piston toward the fluid entrance and toward the fluid exit. As shown in the FIG. 3A, when a piston 12 moves toward a fluid entrance 111, a piston check valve 122 in the piston 12 is opened. Because an entrance check valve 1111 of the fluid entrance 111 for pumping in a fluid and an exit check valve 1121 of a fluid exit 112 for pumping out the fluid are both shut, the fluid 21 previously pumped into a first room 113 from the fluid entrance 111 is forced to flow into the second room 114 through a flow path 121 of the piston 12. On the other hand, as shown in FIG. 3B, when the piston 12 moves toward the fluid exit 112, the piston check valve 122 in the piston 12 is shut and the entrance check valve 1111 and the exit check valve 1121 are both opened. Hence, the fluid 21 is pumped out of the second room 114 and, at the same time, the fluid 21 is pumped into the first room 113 again. By repeating the above movements, a pumping of the fluid 21 is achieved.

Please refer to FIG. 4 and FIG. 5, which are a perspective view and a cross-sectional view showing a second preferred embodiment. As shown in the figures, the present invention comprises a shell 11 having a fluid entrance 111 and a fluid exit 112; a piston 12 having a hollow flow path 121; and an electromagnetic element 13 a, where the shell 11 is divided into a first room 111 and a second room 112 by the piston 12; the electromagnetic element 13 a is covered around a side surface of the shell 11 to form an electromagnetic ring element 13 a; and a magnetic element 123 a is also covered around the piston 12.

To sum up, the present invention is an electromagnetic reciprocating pump, where the pump reciprocates with saved small space; and the pump is improved in its leakage prevention by deposing several check valves and using electromagnetic driving mechanism.

The preferred embodiments herein disclosed are not intended to unnecessarily limit the scope of the invention. Therefore, simple modifications or variations belonging to the equivalent of the scope of the claims and the instructions disclosed herein for a patent are all within the scope of the present invention. 

1. An electromagnetic reciprocating pump, comprising: a shell, said shell comprising a first room, a second room, a fluid entrance, and a fluid exit, wherein an entrance check valve is deposed at said fluid entrance and an exit check valve is deposed at said fluid exit; a piston, wherein said piston is deposed in said shell, wherein said piston has a hollow flow path, wherein a piston check valve is deposed at an end of said flow path, and wherein said piston has a magnetic element; and a pair of electromagnetic elements, wherein said pair of electromagnetic elements is deposed on two ends of said shell respectively.
 2. The pump according to claim 1, wherein a fluid flows to said first room from said fluid entrance through said entrance check valve; and where in said entrance check valve prevents said fluid from returning to said fluid entrance from said first room.
 3. The pump according to claim 1, wherein a fluid flows to said second room from said fluid exit through said exit check valve; and wherein said exit check valve prevents said fluid from returning to said second room from said exit entrance.
 4. The pump according to claim 1, where in a fluid flows to said second room from said first room through said piston check valve; and wherein said exit check valve prevents said fluid from returning to said first room from said second room.
 5. The pump according to claim 1, wherein said magnetic element covers on a side surface of said piston .
 6. The pump according to claim 1, wherein said magnetic element is deposed on both ends of said piston.
 7. An electromagnetic reciprocating pump, comprising: a shell, said shell having a fluid entrance , and a fluid exit, wherein an entrance check valve is deposed at said fluid entrance and an exit check valve is deposed at said fluid exit; a piston, wherein said piston is deposed in said shell, wherein said piston has a hollow flow path, wherein a piston check valve is deposed at an end of said flow path, and wherein said piston has a magnetic element; and an electromagnetic elements, wherein said electromagnetic element covers on a side surface of said electro-magnetic element.
 8. The pump according to claim 7, wherein said magnetic element covers on a side surface of said piston.
 9. The pump according to claim 7, where in said magnetic element is deposed on both ends of said piston. 